Fbed flani



March 7, 1933. F. PIANI 1,900,519

ALARMED CASH REGISTER Filed Feb. 9, 1951 Free fz'ani,

Patented Mar. 7, 1933 7 Fm PIANI, or NEW YORK, N. Y.

Y umlmn cnsn REGISTER Application flled' rem-fie y '9, 931." Serial no. 514,626.

My invention'relates to burglar alarms,

more particularly to burglar alarms for use on cash-registers and the like, and it consists in the combinations, constructions, and

arrangements herein shown and described. I Storekeepers "and the like utilizing receptacles such as cash-registers and'similer de-- vices for containing the money used in their business have long recognized the desirability of having some means for giving an alarm, when said cash-register is operated by unauthorized persons, such as hold-up men, thieves and the like. It is, therefore a primary purpose of my invention to provide a burglar alarm that will automatically be operated, when such unauthorized person opens the cash register. I

A further object of my invention is to provide a device of the type described that is readily applicable to cash-registers of con ventional construction, without great modification thereof.

A still further object of my invention is to provide a burglar alarm that will automatically be operated, when an unauthorized person operates the register equipped with the same, but which can be rendered inoperative by a simple operation, when an authorized operator uses the cash-register.

A still further object of my invention is to provide a device of the type described, which has few parts, is simple to manufacture, and does not get out of order easily.

Other objects and advantages will appear F as the specification proceeds and the invention will be more particularly defined in the appended claim; I

My device is illustrated in the accompanying drawing forming a part of this application, in which Figure 1 is an elevational view of a cashregister equipped with my invention, with parts broken away for clearness of illustratiOIl,

Figure 2 is a sectional view on line 22 of Figure 1, y

Figure 3 is a fragmentary View of a modified portion of my device,

Figure. 4 is a side elevational view of the modification of Figure 3, and

Figure 5 is a schematicrepresentation of the electrical circuit comprised in myin vention.

- In carrying out my invention I make use of an ordinary cash-register generally indi'cated at 1, and having keys 2, and a cashdrawer 3. This cash-register is of that'type of construction, which has keys for reglstering anda separate key orihandle or similar member for opening thedrawer.

In applying the control forthe burgla alarm, which may be placed in a detective agency or be in the form of a sirento, warn the police or in any other desiredform or position, to the cash-register, I mount on the side of the drawer thereof a taperednonconductor, which is adapted to separate and maintain in separated position a pair of resilient contacts 5, when the drawer is inthe closed position as shown most clearly in Figure l. I These contacts are connected to the burglar alarm for energization of the circuit thereof, upon withdrawal of the nonconductor ,4 on opening the drawer. Of course, the non-conductor and associated contacts may be positioned on the bottom of. the drawer 3, on the rear thereof or on either side, as desired, withinthe scope of-my invention. I p c,

In Figures-3and 4 I show the automatic switch mounted onthe rearof. the drawer In this. modification the tapered non-con ductor is securedtolthe rear ofthe drawer and the contacts in the circuit of the alarm are fastened to the rear wall of the register.

I For rendering the alarm, inoperative, when the drawer of the register is opened by authorized operators, a. cut-out switch is provided. This switch is generall indicated at s. It maybe positionedfla'ss own for operation by the kneeof an operator, for operation by his toe or for any other con-f venient mode of operation without departing from my invention. It comprises a air of contacts 9 and 10, the contact 9 of w '011 is secured stationarily to afixed portion as" shown, while the contact 10 comprises a resilie'nt' member 11 for supporting the sa e flexibly. The contacts are normally closed as shown, but are adapted to be operated I trolled .by said keys,

to the open' plunger 12, engaging with the member 11. The spring 13 normally urges theplunger 12 outwardly to keep the contacts 9 and 10 engaged as-shown. t, i

For reminding the authorized operator to operate, the switch 8 to render the alarm inoperative when opening'the drawer of the register, I mount signals in the form of lamps, one of which is shown at 14 in Figure 1, on the register for operationupon depression of the registering keys 2 by means of any suitable contact means con- (not shown). When these signals are energizedthe operator can then depress the plunger 12 torender the alarm inoperative.

lacedin' circuit with the switch '8 as well as the contacts 5 or 7 so that operation ofth'e plunger 12 renders both the signals 14, and" the alarm inoperative.

'In the electrical shown in Figure 5, the current flows from the source of'power 15through switch 8, contacts 5Ior 7, the alarmflfi and back to the source of power; and "from the source of power 15- through' switch 8, switch 2a,

signals 14 and back to the source of power From the foregoing description the use and operation of my invention is easily 1mdrawing the same 7 by a handle.

derstood; When the authorized operator desires to'use drawer thereof, he simply depresses plunger 12 to open the circuit to the alarm, and

operates the register, with the alarm in;

operate the the registering key operative. If 7 he neglects to switch 8, and depresses 2, the signals 14 will indicate tohim that hehasnot opened'the circuit, enabling him to operate switch8 totheopen position beforepressing the key to open thedrawer or withcuit both to signals 14 as well as the alarm 16 thus indicating that the alarm iscut-out.

position by the spring-pressed I v The signalmeans 14' "and. the keys 2. controlling the same are c switch 'rcuit otmy device 5 .When

. switch 8 is operated it'deener'gizes the. cira legitimateuser to theofl' position,'when normal use.

that I have provided a the register is in It is also seen burglar alarm that is readily applicable .to' i I registers of conventional, construction, and

which consists of a minimum number of x parts requiring'simple operations in use.

What I desirejto claim and secure by Letters Patent is: r i

In combination wlth a cash register'having a' plur -ality of keys and a drawer, an

electrical circuit, a

of saidalarnna switchthe operation of whichmakes both circuits inoperable anda special key for operating said last named the register by opening the If an unauthorizeduser of the register 7 these operations without he switch 8 of which he is he will carry out first operating 7 illegalentry into the register.- fIt canfb'e easily understood iz e'dusers'will become accustomed to depress the plunger12, when operating the register 1 in the same manner that automobile drivers] 60' depresses a key and then opensthe drawer,

that mim tj become used to operating a clutch, iwhen working the brakes.

'Itis thus seen that I uhaye provided, a

burglar alarm that automatically a signal. when a cash-register is illegally 1 en-- cfi tered lout which maybeeasilyf operatedby v switch in said circuit 7 'operableby any oneof said keys, an elec 

